RENTON, Wash.—In September, quarterback appeared to be the weakest spot on Seattle's team. In November, it may have been the team's biggest strength.

Russell Wilson completed 16 consecutive passes Sunday in Miami—an NFL rookie record—and finished the game 21-of-27 with two touchdowns. He was not intercepted, the first time that has happened in any road game this year.

That continued his recent hot streak. In his last four games, he is 74-of-105 for 821 yards and nine touchdowns, with only one interception, for a passer rating of 118.0 during that stretch.

The biggest step forward has been his ability to extend plays, scrambling to evade pressure while still looking downfield for his receivers. When Wilson was flushed from the pocket in the first month of the season, he would look to run. Now, he's continuing to look downfield.

The foundation of Seattle's offense remains its running attack with Marshawn Lynch, but Wilson is showing he has the ability to be much more than a game manager. He has 17 touchdown passes this season, most for any rookie.

Meanwhile, the defense that was supposed to be Seattle's strength has turned into its liability.

Seattle has blown two fourth-quarter leads in each of its past two losses. The Seahawks have been especially vulnerable over the middle, as opponents have found a soft spot between Seattle's safeties and its linebackers.